270 Win Found My Recipe

[meatyrem]

How many grains up or down were the other loads and how did they shoot? Reason I'm asking is Imr4350 is a great powder but velocities will change with temperature. I would shoot that good load in different conditions make sure it doesn't fall apart.

That's what I'm thinking. I recently went through the same theming the last couple days. Out of five different charge weights the one in the middle of the range was half inch and the rest were two to almost five inches. So one really good group makes me nervous about that load. My other one was very good throughout all the charge weights most were approximately 1/2" out of 7 different charge weights the two worst were about 1 1/2" spread. So my thoughts are it was very consistent through the ladder test unlike the one the other day where I only
Had one good group and rest were bad.

 

[thomasbangs]

Wow, in over 50 years of reloading of more than a dozen different calibers, several different powders, several different weights of bullets, and different manufacturer of primers, I have never shot a 5 inch group at 100 yds with a rifle or at 25 yds with a handgun.

 

[SecretSquirrel38]

That's what I'm thinking. I recently went through the same theming the last couple days. Out of five different charge weights the one in the middle of the range was half inch and the rest were two to almost five inches. So one really good group makes me nervous about that load. My other one was very good throughout all the charge weights most were approximately 1/2" out of 7 different charge weights the two worst were about 1 1/2" spread. So my thoughts are it was very consistent through the ladder test unlike the one the other day where I only
Had one good group and rest were bad.

The max load is 55grs. I went down 1% from there for 10 steps down to 49.7grs I used excel to do my calculations and rounding. The lower I went the worse it got. IMR4350.

 

[SecretSquirrel38]

How many grains up or down were the other loads and how did they shoot? Reason I'm asking is Imr4350 is a great powder but velocities will change with temperature. I would shoot that good load in different conditions make sure it doesn't fall apart.

The max load is 55grs. I went down 1% from there for 10 steps down to 49.7grs I used excel to do my calculations and rounding. The lower I went the worse it got. IMR4350.

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[SecretSquirrel38]

What's your fps/velocity with this load?

I don't have a chronograph yet so I just go off the book. The gun does have a 24" barrel.

 

[bowhunter123456789]

So I'm assuming that you're using the coal of 3.300 from the book? Going to load up a few with the 55g imr for my Tikka t3x 270

 

[sjt18]

So I'm assuming that you're using the coal of 3.300 from the book? Going to load up a few with the 55g imr for my Tikka t3x 270

COAL/CBTO seem to be a much bigger deal than I thought. "Book" recommendations vary quite a bit too.

 

[SecretSquirrel38]

So I'm assuming that you're using the coal of 3.300 from the book? Going to load up a few with the 55g imr for my Tikka t3x 270

COAL from the book is 3.340 and that is what I loaded to. I won't go above the book COAL when reloading any round. Factory rounds are typically below COAL.

 

[sjt18]

COAL from the book is 3.340 and that is what I loaded to. I won't go above the book COAL when reloading any round. Factory rounds are typically below COAL.

My TGK is at 3.36- max for my magazine. Still about .020-.040 off the lands as best I can tell. It shoots pretty good.

I have 200 Norma Tipstrike bullets. Max COAL didn't work very well. I lost velocity and accuracy. After deer season, I'm going to start walking the length down to see if I can find accuracy and velocity. If not, I'll have to try a different powder. I'm using Hunter right now.

Norma factory ammo with that bullet seats REALLY deep. My last rounds were 3.320 about .020 off the lands.. Factory is about 3.170. I've found recommended COAL from 3.169 to 3.300

 

[VinceMule]

The 140 Tip strike is very accurate in an old well worn Ruger 77. 200 yd groups are very impressive, with H4831 with cci 250s, plenty good enough for a short range woods gun. Sorted Ogive lengths are as good as the best lots of berger bullets. I have yet to kill a deer with these tip strikes. I cut a bullet open, peeling back the jacket to the base. There is a very impressive Lock on the core in the base of the jacket, much more than the Hornady Interlock.

 

[sjt18]

The 140 Tip strike is very accurate in an old well worn Ruger 77. 200 yd groups are very impressive, with H4831 with cci 250s, plenty good enough for a short range woods gun. Sorted Ogive lengths are as good as the best lots of berger bullets. I have yet to kill a deer with these tip strikes. I cut a bullet open, peeling back the jacket to the base. There is a very impressive Lock on the core in the base of the jacket, much more than the Hornady Interlock.

Can you share your load data? I haven't used H-4831 yet but have some sc I can use. I've been working on Ramshot Hunter. It should work well if I can find the right combo but can switch if necessary. I have both CCI 200 and CCI 250 primers.

I would also be interested in your COAL, CBTO- seating depth, case length, etc. My rifle seems to be sensitive to harmonics so I'm looking for the right seating depth.

PS- I think I could take what I have an hunt. Groups are under 2". I have my OAL around 3.320 and velocities have fallen to mid-2800s. The factory rounds were seated deep AND very hot. I think they were about 50 fps over label which was already over 3000 fps.